Machine for making plow-point molds.



F. A.. BREEZE.

MACHINE FOR MAKING PLOW POINT MOLDS. APPLICATION man JUNE a. 1915.

1,167 675. Patented Jan. 11, 1916.

I 3 SHEETS-SHEET l F. A. BREEZE.

MACHINE FOR MAKING PLOW POINT MOLDS.

APPLICATION FILED JUNE 3,1915. 1,167,675. Patented Jan.11, 1916.

3 SHEETS-SHEET 2.

E E %Q I 75 g! [2 v ihhlnL anoe/Mica ewmmm E I FranflBreeze F, A. BREEZE.

MACHINE FOR MAKING PLOW POINT MOLDS.

APPLICATION FILED JUNE 3. 1915 1,167,675. Patented 171111.11, 1916.

3 SHEETS-SHEET 3.

viwwtoz ism; A. BREEZE, or NnwsURen, ONTARIQCANADA.

MACHINE F03 MAKING rLow-rom'r MOLDS.

Specification of Letters Patent.

Patented J an, 11, 1916.

ap neaticnelea June 3, 19,15. seriarao. 31,928.

To all whom it may concern:

Be it known that I, FRANK A. Bnnnzn, a

subject of the King of'Great Britain, re-

siding at Newburgh, in the Province of Ontarioiand Dominion of Canada, have invented certain new and useful Improvements in Machines for Making Plow-Point Molds; and I do declare'the following to be a full, clear, and exact'description of the invention, such as will enable others skilled in the art to which it appertains to make and usethe same.

My invention relates to machines for forming sand moldsfor the casting of plow points and has for its object toprovide a simple, durable and efiicient construction whereby the pattern may be removedi-from the body of sand without mutilating the, walls of the depression pattern in such sand. In accomplishing this result, I provide certain novel features of construction and unique combinations of parts hereinafter fully described'and claimed, one embodiment of'the invention being shown in the accompanying drawings wherein like reference characters designate corresponding parts throughout the several views and wherein: i Figure -1 is a top plan view ofa. machine constructed in accordance with my invention; Fig. 2' is a bottom plan view thereof;

]E ig.-3 is a verticallongitudinal section as seen along the plane indicated by the line 3 -3 of Fig. 2, with all parts ofthe machine disposed to active position andrillustrating a similar view showing the two movable thes'and packed in the mold bok; Fig. 4 is sections of the pattern "swung downwardly "without disturbing thec'avity formedthereby in the sand; Fig. 5 is a verticaltransverse sectlon as seen along the plane indl- "cated by the line "5-5 of Fig. 2, witlrthe parts disposed as shown in Fig. 3; Fig. 6 is r a view similar to Fig. 5 and showing the aforesaid partsin the positions disclosed in Fig.4. I

Inthese drawings which constitute a part of the application, the numeral 1 designates "a horizontally disposed table having in its upper side a recess 2 from which a suitably shaped opening 3-leads to the under sideof saidltable as clearly disclosed in the several SEtitlOl'lfll views. The opening 3 snugly receives therein the plow point pattern 4 which is formed of a main body section '5 and a supplemental side section 6 received by an offset 7 formed in said body section.

Thesection 5 is of substantially triangular formation and is shaped upon its upper side in such a manner as to impart the necessary shape to one side of the sand mold S which is formed thereby, while the section 6 1s constituted by an'upright plate received by the offset 7 as hereinbefore stated, this effect being shown in the present application {as formed in the edge of the body 5 corresponding to the land side of the point to :bercastin the completed mold. a l

The section 5is secured to the upper ends "ofa pair ofL-shaped arms 9 disposed beneath the table, and fulcrumed at their op-- POSlt ends to a horizontally disposed shaft 10, this-shaft being supported by appropri- "atebrackets orbearings 11 which depend from the table.

the section 5 isidisposed longitudinally of It is to be observed, that the table 1 and that the arms 9 are positioned transversely thereof, but not at rightangles to the land side of said'scction 5, this being necessary 1n allowing certain projections with which the upper side of this sec,

tion-is provided, to be withdrawn from the s'andmold 8 without injuring the cavity formed therein. a a

Thegupright plate or- -section 6, as clearly shown :in the top andbottom plan views as well as in longitudinal sectionalviews, ,is disposed longitudinally of the table and is securedat its lower edge to a longitudinally extending arm 12 located beneath said table andufulcrumed to a bracket13 depending therefrom, this arm 12 beingshown in the present embodiment of the invention as dispos'edabove the L-shapedarmsQ. Thus it will be seen that whenthe arm 12 and the arms9 are allowed to swing downwardly successively, the section 6 will be first withdrawn from the mold by practically a true downward movement, whereas the section 5 will not move directly downward but due totheangular arms 9, will swinglaterally and downwardly, thus causing it to leave the walls of the cavity in the mold with 'which it ccntacts, without sliding thereon to any appreciable extent. This positively overcomes any danger of mutilating the completed mold, provided the sand be packed therein to the necessary extent.

In order to maintain the two sections 5 and 6 of the pattern +1- in their uppermost active positions, and to lower the same successively as above suggested, any preferred means may be provided, this means being shown in the present application in the form of a cam shaft 14 rotatably mounted in bearings depending from the table 1, said shaft being disposed transversely of the table beneath the shaft 10 and the arm 12 as clearly shown in the several figures of the drawings. The shaft 14: is provided with a substantially circular cam 15 having one of its sides'removed as at 15, and with a cam arm 16, the latter being normally disposed in contact with the under side "of the arm 12 while the former supports thereon a post or 'the' like 17 depending from the section 5 of the pattern 4:. The relation of the cam 15 and the cam arm 16 is such as to cause the latter .to release-the arm 12 before the post 17 is released, it being therefore evident that the section 6 of the pattern 4 will be lowered ahead ofthe section 5 as hereinbefore suggested. Needless to say, in order to actuate theaforesaid cams, it is necessary to rotate the shaft 14, for which purpose any desired means may be provided,'such means being incorporated in the present apphcatlon 1n the form of a hand wheel 18;

In applying the invention to use, a mold box 19 is disposed aroundthe cavity 2 and is held in this position by studs 20 which rise from the table 1 through brackets 21 carried by said box. The two sections of the'pattern 4 are now disposed to active po- 'sition by proper manipulation 'of the hand wheel 18, and finally damp sand is packed in the box 19, it being thus evident that the sections 5 and 6 will form a cavity of the desired shape in the lower side of the body of sand, such cavity constituting the complete sand mold above mentioned. The pattern 4 may now be lowered by rotation of the hand wheel 18, during which operation the several walls of the cavity formed in the sand will remain undisturbed due to the fact that the two sections 5 and 6 move in such directions as to prevent excessive sliding upon such walls. This result cannot be effectively accomplished by pattern sections movable in truly vertical planes as has been proven by years of experimenting, it being thus evident that it is highly essential to mount such sections of the moldupon pivoted arms. Furthermore, in most cases, it is desirable to dispose these arms in such a manner as to cause the same to swing in intersecting planes.

' and the metal has cooled and hardened, the

sand mold is broken as'usual and the complete point is removed from the templetplate. v

Fromthe foregoing description, taken in connection with the accompanying drawings, it will be evident thatalthough comparatively simple construction has been provided for carrying out the object of the invention, the machine will be highly eflicient in operation and will possess a number of advantageous features.v J Particular emphasis is laid upon the provision of the pivotallyisupported arms upon which the sections of the pattern are mounted, and upon the fact that these armsswing in intrsectingplanes, these features being deemed the most salient of the invention. r 1 Y In the drawings, I have shown certain specific details of construction for producing.

probably the best results, and in the preceding, suchdetails have been described, but I it will be evident that I need not be limited thereto, otherwise than to the extent to which the appended claims restrict me.

I claim l 1. A mold forming machine comprising a "table having therein an opening, a pair of vertically movable pattern sections normally disposed in and closingsaid opening, and independent pivotally supported arms for the two sections swinging in. intersecting planes. 7 r A V 2. A mold forming machine comprismg'a table having therein an opening, a pair of vertically movable pattern sections normally dis osed in and closin said 0 enin independent pivotally supported arms swinging in intersecting planes and secured respectlvely to the two sections, and independent successively released supportingmembers retaining the two sections of the patternnin their raised active positions. I

3. In a mold forming machine, the combination with a table having therein an opening, and a pair of downwardly movable pattern sections normally closing said opening, of a horizontal rock shaft below the table, a radial arm carried by said shaft for supporting one of said pattern sections until the shaft is rocked, and an eccentric on the edge of which the other section is supported until said shaft is rocked, said eccentric having a portion of its edge disposed conmy hand in presence of two subscribing witcentric with the shaft, whereby the pattern nesses.

section supported by said eccentric will remain supported a predetermined length of FRANK BREEZE 5 time after the other section has been re- Witnesses:

leased byits supporting arm. ANNA E. HANLON, In testimony whereof I have hereunto set EMILY E. BILLING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

